B. Complete la descripción del circuito de la Figura 3.1 con las palabras siguientes:
at
of
on
in
across
Figure 3.1 shows a phase-shift oscillator circuit. The principle to have a phase shift 180 180 degrees the phase-shift oscillator is the feedback network and the transistor, so that positive feedback is obtained. The feedback the circuit shown contains three RC sections (R₁ C1, R2C2, R3C3. Figure
3.1). The phase the signal shifts 60 degrees
each one each section depends the RC sections. The capacitive reactance the frequency, therefore the required 180 degree phase shift occurs only
one frequency, which is the oscillator frequency